2010-03-26 19:12:56 +01:00
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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/arm.
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2012-03-27 23:04:59 +02:00
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# Check for support of thread-local storage handling in assembler and
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# linker.
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AC_CACHE_CHECK(for ARM TLS support, libc_cv_arm_tls, [dnl
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cat > conftest.s <<\EOF
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.section ".tdata", "awT", %progbits
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.globl foo
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foo: .long 1
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.section ".tbss", "awT", %nobits
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.globl bar
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bar: .skip 4
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.text
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.word foo(tpoff)
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.word foo(tlsgd)
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EOF
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dnl
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_arm_tls=yes
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else
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libc_cv_arm_tls=no
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fi
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rm -f conftest*])
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if test $libc_cv_arm_tls = no; then
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AC_MSG_ERROR([the assembler must support TLS])
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fi
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dnl It is always possible to access static and hidden symbols in an
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dnl position independent way.
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dnl NOTE: This feature was added by the GCC TLS patches. We should test for
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dnl it. Until we do, don't define it.
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#AC_DEFINE(PI_STATIC_AND_HIDDEN)
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2010-03-26 19:12:56 +01:00
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AC_CACHE_CHECK([whether the CFI directive .cfi_sections is supported],
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[libc_cv_asm_cfi_directive_sections],
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[cat > conftest.s <<EOF
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.text
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.cfi_sections .debug_frame, .eh_frame
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.cfi_startproc
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.cfi_endproc
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EOF
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if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_asm_cfi_directive_sections=yes
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else
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libc_cv_asm_cfi_directive_sections=no
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fi
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rm -f conftest*])
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if test $libc_cv_asm_cfi_directive_sections != yes; then
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AC_MSG_ERROR([need .cfi_sections in this configuration])
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fi
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